Cisco ASR 5000 series Product Overview page 199

ASN Gateway Overview
Figure 57.
MS
Table 41. Call Flow Showing How Additional Quota is Obtained
Step Description
1 During network entry, a NAS sends an Access-Request packet to the HCSN. If the NAS supports a PPC, the NAS includes
the PPAC attributes, indicating it prepaid capabilities.
2 If the subscriber session is a prepaid session, the PPS (HAAA) assigns the initial prepaid quota(s) by including one or more
PPAQ attributes in the Access-Accept packet.
3 Once the threshold for the quota(s) is reached, the PPC sends an Authorize-Only Access-Request to request additional
quota. The request contains one or more PPAQs that indicate which quota(s) need to be replenished to the PPS.
OL-22938-02
Call Flow Showing How Additional Quota is Obtained
Threshold Reached
IP Datagrams
Threshold Reached
IP Datagrams
Quota Expiry
IP Datagrams
ASN-GW
(PPC)
Access-Request/PPAC
Access-Accept/PPAC
Access-Request/PPAC
Access-Accept/PPAC
Access-Request/PPAC
Access-Accept/PPAC
Access-Request/PPAC
Access-Accept
ASN Call Procedure Flows ▀
PPS
(H-AAA)
1
2
3
4
5
6
7
8
Cisco ASR 5000 Series Product Overview ▄